Showing 101 - 120 results of 1,014 for search '"ultraviolet–visible spectroscopy"', query time: 0.17s Refine Results
  1. 101

    Synthesis of Copper Nanoparticles and Their Antimicrobial Performances in Natural Fibres by Chowdhury, M. N. K., Beg, M. D. H., Khan, Maksudur R., Mina, M. F.

    Published 2012
    “…The reduction of the solution of copper chloride salt in the polyvinyl alcohol system was done by sodium borohydride solution. The ultraviolet–visible spectroscopy, Fourier transformed infrared spectroscopy, transmission electron microscopy and X-ray diffraction studies were employed to analyse the formations and sizes of nanoparticles. …”
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  2. 102

    Antibacterial mechanism of biogenic copper nanoparticles synthesized using Heliconia psittacorum leaf extract by Roy Kaushik, Sarkar Chandan K., Ghosh Chandan K.

    Published 2016-12-01
    “…The stability and gradual formation of copper nanoparticles during interaction with the extract were investigated using ultraviolet-visible spectroscopy. The pattern of X-ray diffraction revealed the crystallinity and different phases of the nanoparticles. …”
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  3. 103

    Recent Research Advancements of Coffee Quality Detection: Targeted Analyses vs. Nontargeted Fingerprinting and Related Issues by Yumei Chen, Boyan Gao, Weiying Lu

    Published 2023-01-01
    “…The nontargeted techniques commonly involve LC, GC, nuclear magnetic resonance (NMR), infrared spectroscopy (IR), ultraviolet-visible spectroscopy (UV-Vis), laser-induced breakdown spectroscopy (LIBS), and mass spectrometry (MS). …”
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  4. 104

    Novel sustained-release of Stryphnodendron obovatum leaves extract using natural rubber latex as carrier by Felipe Azevedo Borges, Paula Ratsue Siguematsu, Rondinelli Donizetti Herculano, Catarina Santos

    Published 2015-07-01
    “…Thus, the aim of this work were to study the release behavior of the hydroethanolic extract from the leaves of S. obovatum loaded in the NRL by ultraviolet–visible spectroscopy (UV-VIS). The release followed a biexponential pattern and the mechanism of release was Super Case II (n > 1). …”
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  5. 105

    Sol-Gel TiO2 thin films sensitized with the mulberry pigment cyanidin by Emerson Henrique de Faria, Alex Lemes Marçal, Eduardo José Nassar, Katia Jorge Ciuffi, Paulo Sergio Calefi

    Published 2007-12-01
    “…Our aim was to investigate the interaction between the semiconductor and the dye, as well as the influence of the velocity and number of deposits on the characteristics of the film. Using ultraviolet-visible spectroscopy, we observed a shift from the maximum absorption band at 545 nm for the dye’s ethanol solution to 595 nm for the film, indicating interaction of the cyanidin with the TiO2. …”
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  6. 106

    Study of Structural, Morphological and Optical Properties of Magnesium Hydroxide Nanoplates Synthesized by Precipitation Route by S. yousefi, B. Ghasemi, M. Tajalli, A. Asghari

    Published 2018-03-01
    “…The study and characterization of various properties of obtained nanopowder was carried out by X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive X-ray Fluorescence Spectrometer (EDX), Fourier Transform Infrared Spectrophotometer (FTIR) and Ultraviolet–visible spectroscopy (UV-Vis). The FESEM and XRD analysis results showed that magnesium hydroxide powder had nanoplates with the average crystallite size 17.1nm and no impurity; that was in agreement with the result of EDX and FTIR perfectly. …”
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  7. 107

    Detection of betacyanin in red-tube spinach (Spinacia oleracea) and its biofortification by strategic hydroponics. by Sho Watanabe, Yuta Ohtani, Wataru Aoki, Yuko Uno, Yasunori Sukekiyo, Seiichi Kubokawa, Mitsuyoshi Ueda

    Published 2018-01-01
    “…We first detected the presence of betacyanins in red-tube spinach (Spinacia oleracea) through ultraviolet-visible spectroscopy and mass spectrometry. We then hydroponically cultivated plants in the presence of three candidate compounds for betacyanin biofortification: dopamine, Ca2+, and sucrose. …”
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  8. 108

    Effect of Sn doping in optical properties of Se-Ge glass and glass-ceramics by P. Bavafa, M. Rezvani

    Published 2018-09-01
    “…Fermi energy, over-batch energy, and direct and indirect band gap energies were calculated using Ultraviolet–visible spectroscopy (UV spectra). Physical properties including hardness, coordination number, and density were investigated, with the influence of different amounts of Sn on these properties further studied. …”
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  9. 109

    Cerium/diethyldithiocarbamate complex as a novel corrosion inhibitive pigment for AA2024-T3 by Iman Mohammadi, Taghi Shahrabi, Mohammad Mahdavian, Mazdak Izadi

    Published 2020-03-01
    “…The structure of the synthesized pigment was characterized by employing Fourier transfer infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, inductively coupled plasma optical emission spectroscopy, and ultraviolet-visible spectroscopy. All of the characterization techniques showed that the Ce-DEDTC pigment was successfully produced. …”
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  10. 110

    Plasma Synthesis and Characterization of PANI + WO<sub>3</sub> Nanocomposites and their Supercapacitor Applications by Nikolay Sirotkin, Anna Khlyustova

    Published 2023-04-01
    “…The prepared materials were analyzed by X-ray diffraction (XRD), ultraviolet-visible spectroscopy (UV-Vis), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). …”
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  11. 111

    One-step green synthesis and characterization of leaf extract-mediated biocompatible silver and gold nanoparticles from Memecylon umbellatum by Arunachalam KD, Annamalai SK, Hari S

    Published 2013-03-01
    “…The reaction process was simple and easy to handle, and was monitored using ultraviolet-visible spectroscopy. The effect of the phytochemicals present in M. umbellatum, including saponins, phenolic compounds, phytosterols, and quinones, on formation of stable silver and gold nanoparticles was investigated by Fourier-transform infrared spectroscopy. …”
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  12. 112

    Synthesis and polymerization of 2-(1-methylbut-2-en-1-yl)aniline and its products modification by Akhat G. Mustafin, Lyaysan R. Latypova, Anastasiia N. Andriianova

    Published 2021-12-01
    “…The structures and composition of the polymers that we synthesized were confirmed by elemental analysis, proton nuclear magnetic resonance (1H NMR) spectroscopy, carbon nuclear magnetic resonance (13C NMR) spectroscopy, Fourier-transform infrared spectroscopy (FT-IR), and ultraviolet–visible spectroscopy (UV). Characterization by FT-IR and UV–visible spectroscopy techniques indicated that the polymers exist in protonated emeraldine forms. …”
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  13. 113

    Palladium nanoparticle-decorated reduced graphene oxide sheets synthesized using Ficus carica fruit extract: A catalyst for Suzuki cross-coupling reactions. by Jaculin Raiza Anasdass, Pandian Kannaiyan, Raghunathan Raghavachary, Subash C B Gopinath, Yeng Chen

    Published 2018-01-01
    “…The synthesized material was well characterized by morphological and structural analyses, including, Ultraviolet-Visible spectroscopy (UV-Vis), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and Transmission Electron Microscopy (TEM) and Raman spectroscopy. …”
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  14. 114

    IDENTIFIKASI SENYAWA FLAVONOID PADA FRAKSI ETIL ASETAT BENALU BATU (Begonia sp.) ASAL KABUPATEN MOROWALI UTARA by Agus Ritna, Syariful Anam, Akhmad Khumaidi

    Published 2016-10-01
    “…In the result of Ultraviolet-Visible Spectroscopy with methanol at wavelength range of 200-550 nm, the isolates showed absorption peaks at 275 nm (peak 1) and 225 nm (peak 2). …”
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  15. 115

    Characterization of self-assembled silver nanoparticle ink based on nanoemulsion method by Donghao Hu, Kazuyoshi Ogawa, Mikio Kajiyama, Toshiharu Enomae

    Published 2020-05-01
    “…Dynamic light scattering and ultraviolet-visible spectroscopy clarified that an increased concentration of AgNO3 decreased the particle size.…”
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  16. 116

    Techniques and methods of characterization of admixtures for the concrete by M. Palacios, C. Sierra, F. Puertas

    Published 2003-03-01
    “…A lot of techniques have been employed like: ionic chromatography, ultraviolet-visible spectroscopy (UV-VIS), Fourier transform infrared spectroscopy (FTIR), Fourier transform Raman spectroscopy (FT-Raman), nuclear magnetic resonance spectroscopy (1H-RMN and 13C-RMN), gel permeation chromatography (GPC). …”
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  17. 117

    Anisotropic silver nanoparticles deposited on zeolite a for selective Hg2+ colorimetric sensing and antibacterial studies by Khorshidi Alireza, Heidari Behrooz, Inanlu Hamidreza

    Published 2015-01-01
    “…Formation of the silver nanoparticles on the surface of zeolite A was verified by surface plasmon spectra using diffuse reflectance spectroscopy and ultraviolet-visible spectroscopy. Morphology of the prepared samples was characterized by X-ray diffraction and scanning electron microscopy. …”
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  18. 118

    Influence of Illumination on Porous Silicon Formed by Photo-Assisted Etching of p-Type Si with a Different Doping Level by Olga Volovlikova, Sergey Gavrilov, Petr Lazarenko

    Published 2020-02-01
    “…The impact of etching duration, illumination intensity, and wafer doping level on the etching process was investigated using scanning electron microscopy (SEM), atomic force microscopy (AFM), and Ultraviolet-Visible Spectroscopy (UV&#8722;Vis&#8722;NIR). The silicon dissolution rate was found to be directly proportional to the illumination intensity and inversely proportional to the wafer resistivity. …”
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  19. 119

    New Methode for Synthesis of PbO Nano-Rods and its application in ionizing radiation shielding by S Yazdani Darki, M Eslami-Kalantari, H Zare

    Published 2021-02-01
    “…Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), ultraviolet–visible spectroscopy (UV–Vis), and photoluminescence spectrophotometer (PL) were used to characterize the samples. …”
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  20. 120

    New Technique for Estimation of Ciprofloxacin hydrochloride by using UV-VIS Spectrophotometer by Ali Rasool Mahmood Albakaa, Hayder Jafer Essa

    Published 2018-03-01
    “… New, basic and quick method showing ultraviolet - visible spectroscopy was produced and approved for the estimation of ciprofloxacin in immaculate shape and in separate details. …”
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